It’ll be fine. Keep in mind that the world has run on handwritten signatures for a few hundred years. And anyone could say anything in a letter with no “pixels” to prove it right.

Digital media as strong evidence has been a novelty.

If anything the real thing to watch out for will be the echo of national digital ID. This would certainly solve the mild/moderate issues of deepfakes while (if done poorly) risking a serious upgrade to surveillance state/capitalism.